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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Remote method initiates an electric arc over a large range of gaps between two water-cooled electrodes of an arc-heated wind tunnel without disassembling the arc unit. This type of starting system can be used on both three-phase ac arc heaters and dc arc heaters.
Hand carried, solid state, 18-channel detector system constantly monitors contact conditions in relays. The system is relatively insensitive to external noise and is powered by standard 110 volt ac.
Four-terminal network forms a bidirectional valve which will switch or alternate an ac signal without crossover distortion or threshold effect. In this network, an isolated control signal is sufficient for circuit turn-on.
Solid state circuit selects the highest of several ac accelerometer signals and gates this signal to an output amplifier, preserving all the frequency information in the peak signal. If the amplitudes of the accelerometer signals change with time, the circuit will continually switch to the highest signal, rejecting the smaller signals.
Performance characteristics of electric contacts in low power circuit, and establishment of lower limits for ac and dc voltages
Comparison of stitched foam thermal insulation protection system for liquid hydrogen tank wall of Centaur launch vehicle with ac-6 jettisonable insulation
Reinforced cylindrical shell frequency analysis for calculation of natural frequencies for F-1 and AC-2 Centaur adapters
Sine current screening and ac square wave tests to evaluate magnetic and electrical properties of materials for use as magnetic components in static converters and inverters
Central static invertor used to establish 1250-va, 115/200-v, three-phase 400-cps AC power distribution for Apollo Spacecraft Command and Service Module
Basic considerations for DC to DC conversion networks, detailing relationship between characteristics of active resistor and maximum AC POWER generated by active element
Blood pressure reprogramming adapter separates the two components of a blood pressure signal, a dc pressure signal and an ac Korotkoff sounds signal, so that the Korotkoff sounds are recorded on one channel as received while the dc pressure signal is converted to FM and recorded on a second channel.
Test signals, AC analysis, transfer function determination, and nonlinear components for single parameter testing of amplifier
Single parameter testing of ac and dc amplifiers
Operational characteristics, problems, and failures of ac electromagnetic pumps used in SNAP-8
Design, development, and life tests of electron bombardment cesium ion engine system, permanent magnet engine, and ac discharge engine
Frequency response testing of ac and dc amplifiers, and single parameter testing of X-Y PLOTTER
Frequency stabilization of gas laser by discriminant, using discharge tube with gain profile split by AC magnetic field
AC motor design for operation in He in cryogenic to room temperature range, noting performance parameters and design considerations